What is needed to add LCD to GoPro 3+ Black

[Malpaso]

I'd like to add an LCD screen to my GoPro 3+ Black for diving. Is the screen and door listed here all I need?

Amazon.com : BacPac GoPro HERO3 LCD Touch : Underwater Camcorders : Camera & Photo

 

[miked]

That's all I needed (the screen and the appropriate door).
A few observations based on my experience:
Using the lcd really increases drain on the batteries.
trying to turn the screen off can sometimes be a nuisance- occasionally it will shift from "viewscreen" mode to "here are the vids you had already recorded" mode, instead of shutting off.
If you have the screen attached, but turned off, you can't see the "recording " light that is on the back of the camera.
I have a few "unintended" videos to show for that,
While none of those are dealbreakers, they are things that I wish I knew from the start.

 

[Malpaso]

Using the lcd really increases drain on the batteries.

I've read that elsewhere as well. Seeing as I get just about an hour on a battery charge, the same as an average dive, any decrease would be unfortunate. I may get the lcd for land use, and not use it on dives.